Rotary surfacing tool



March 5, 1940.

R. K. TAYLoR 2,192,459

ROTARY SURFACING TOOL Filed March 7, 1958 ATTORNEYS Patented Mar. 5, 1940` UNITED STATES4 ATENT; -ortica 2,192,459 ROTARY SURFACING ToorJ Robert K. Taylor, Spartanburg, S. C. pplication March 7, 1938,- Serial No. 194,443

4 Claims.

This invention relates to surfacing tools for reiinishing triple valve seats or any other device wherein the valve seat face may become uneven from wear or any other cause and has for the primary object the provision of a device of this character which employs a power driven rotary cutter and a-holder therefor, whereby the device may be manually moved over aseat to rer-v nish the latter and thereby remove irregularities therefrom, the holder and power drive being of such a construction thatadjustment may be` For a complete understanding of my invention, y reference is to be had to the following description and accompanying drawing, in which Figure 1 is a side elevation illustrating a rotary surfacing tool constructed in accordance with my invention.

Figure 2 is a top plan View illustrating the device. f

Figure 3 is a transverse sectional view showing the tool in engagement with a valve seat rci the type employed in a triple valve. y

Figure 4 is a fragmentary longitudinal sectional view showing a portion of the holder and the power driven cutter carried thereby.

Figure 5 is a detail side elevationv showing 'a part of the power drive means. y

Figure 6 is a fragmentary bottom plan view showing the cutter.

Referring in detail to the drawing, the'numeral I indicates an elongated body of a holder having connected to one end a handle 2 and its opposite end a control valve 3. The body intermediate its ends is provided with an opening 4 to receive a i'lud motor 5. The walls of the opening 4 are chambered to form anannular passage 5 and in direct communication therewith is a passage 'I to which the valve 3 is connected. Through the use of a iiexible hose or pipe 8 the valve 3 is connected to a source (not shown) of `fluid pressure.

The walls of the opening 4 are screw threaded to match screw threads of a cylinder I0 forming a part of the uid motor. The cylinder has ports IIl in direct communication with the passage 6. The cylinder IIl extends through the top wall of the body I and has threaded thereon a cap I2 having exhaust ports I3 and also integral therewith is a bearing I4 rotatably supporting the shaft I5. The shaft I5 is further rotatably supported by an end wall of the cylinder I0 and has threaded thereon the cutter I'll. Secured on the shaft I5 is a plurality of blades Il so arranged with respect to the ports I I that the iluid pressure may impinge against said blades for the rotation of the shaft I5 and the cutter carried f by the latter.

The cylinder Ill being threaded in the body permits the cutter to be adjusted relative to the work engaging face A of the body. Detachably secured on the body to provide said face are wear plates I I and I2 which are slightly Wider than the bodyand thereby forming guide flanges I8 and I9, respectively. In use, the end B of the body is the advance end and the end C the trailing end. The plate I2' carrying the flanges i9 is of `a greater height than the plate II' carrying the Iianges I8, the plate I I" being disposed next to the advance end B of the body while the plate I2 is disposednext to the trailing end C ofthe body. In other words, the plate II travels in` advance of the cutter while the plate I2' trails the cutter. The cutter is adjusted so as to cut a selected distance below the bottom face of the plate II. Consequently, the thickness of the .plate II governs the depth of the cut while the l plate I`2".rides on the renishing surface maintaining the body throughout its length level and fully supported on the device being resurfaced.

' By having the wear plates detachably mounted on the body I the operator may remove said plates and substitute others of different dimensions when desiring to vary the cutting action of this tool. When the plates are changed the rotary cutter also is accordingly adjusted or ree moved and substituted by anotherof a different cutting capacity.

The device described in detail and shown in thedrawing is especially adapted for resurfacing or refinishing a Valve seat of a triple valve. 'I'he valve seat in this instance forms an integral part of -a sleeve 2l so that in order to reinish the valve seat it is necessary to move the tool endwise through the sleeve 2 I This operation is clearly shown in Figure 3. As the tool is advanced, with the motor in operation, endwise of the sleeve 2l and against the valve seat, the cut. ter Il) renishes the valve seat removing there- The fluid pressure escapes from' rtlflecylinder Iii by way of the exhaust ports I3.

from all irregularities caused by wear and other i causes. During `the use of this tool the operator grasps the handle 2 and the valve 3 for the seat, consequently it will be seen that the tool described is convenient to handle and move .relative to a valve seat and Will eiiciently renish the valve seat with maximum accuracy.

What is claimed is:

l. A surfacing tool comprising an elongated body having an opening therethrough and a passage in communication with said opening and extending through one end of said body, means for connecting said passage to a fluid supply, a fluid motor adjustably mounted in said opening and in communication with the passage to be driven by huid pressure, and a rotary cutter secured to said motor and adjustable relative to one face of the body.

2. A surfacing tool comprising an elongated body having an opening therethrough and a passage in communication with said opening and extending through one end of said body, means for connecting said passage to a` fluid supply, a iuid motor adjustably mounted in said opening and in communication with the passage to be driven by fluid pressure, a rotary cutter secured to said motor and adjustable relative to one face of the body, and guides on said face of the body for guiding the movement of the body over a surface and for gaging the depth of the cut made by said cutter.

A surfacing tool comprising an elongated body having a screw threaded opening and a passage in communication With said opening, a valved means for connecting said passage to a fluid pressure supply, a cylinder threaded in said opening and having ports in communication with the passage, a cap threaded on said cylinder and engaging one face of said body and provided with exhaust ports, a shaft rotatably supported by said cylinder and the cap, blades secured on said shaft and arranged adjacent the rst named ports to be acted on by iiuid pressure, and a rotary cutter secured to said shaft and adjustable relative to another face of said body by the rotation of the cylinder in the body in opposite directions.

4. A surfacing tool comprising an elongated body having a screw threaded opening and a passage in communication with said opening, a valvedmeans for connecting said passage to a fluid pressure supply, a cylinder threaded in said opening and having ports in communication With the passage, a cap threaded on said cylinder and engaging one face of said body and provided with exhaust ports, a shaft rotatably supported by said cylinder and the cap, blades secured on said shaft and arranged adjacent the iirst-named ports to be acted on by fluid pressure, a rotary cutter secured to said shaft and adjustable relative to another face of said body by the rotation of the cylinder in the body in opposite directions, and guides formed on the last-named face of the body, certain of said guides acting to gage the depth of cut made by said cutter and the other guides aiding in supporting the body for movement over a surface.

ROBERT K. TAYLOR. 

